C++ Subscriber_var::delete_datareader方法代码示例

void MultiTopicDataReaderBase::cleanup()
{
  DDS::Subscriber_var sub = resulting_reader_->get_subscriber();
  for (std::map<std::string, QueryPlan>::iterator it = query_plans_.begin();
       it != query_plans_.end(); ++it) {
    sub->delete_datareader(it->second.data_reader_);
  }
  DataReaderImpl* dri = dynamic_cast<DataReaderImpl*>(resulting_reader_.in());
  SubscriberImpl* si = dynamic_cast<SubscriberImpl*>(sub.in());
  si->remove_from_datareader_set(dri);
  dri->cleanup();
}

//.........这里部分代码省略.........
      ACE_OS::fclose(readers_ready);

      // Check if the publisher is up and running
      ACE_stat stats;
      while (ACE_OS::stat (pub_ready_filename, &stats) == -1)
        {
          ACE_Time_Value small_time(0,250000);
          ACE_OS::sleep (small_time);
        }

      for (int count = 1; count <= sub_reinit_itr; count++)
        {
          if (verbose) {
            ACE_DEBUG ((LM_DEBUG, "(%P|%t) Reinitializing subscriber.\n"));
          }

          // Create the subscriber and attach to the corresponding
          // transport.
          DDS::Subscriber_var sub =
            participant->create_subscriber(SUBSCRIBER_QOS_DEFAULT,
                                           DDS::SubscriberListener::_nil(),
                                           ::OpenDDS::DCPS::DEFAULT_STATUS_MASK);
          if (CORBA::is_nil (sub.in ())) {
            ACE_ERROR_RETURN ((LM_ERROR,
                               "(%P|%t) Failed to create_subscriber.\n")
                              , -1);
          }

          // Create the Datareaders
          DDS::DataReaderQos dr_qos;
          sub->get_default_datareader_qos (dr_qos);
          DDS::DataReader_var dr = sub->create_datareader(topic.in (),
                                                          dr_qos,
                                                          DDS::DataReaderListener::_nil(),
                                                          ::OpenDDS::DCPS::DEFAULT_STATUS_MASK);
          if (CORBA::is_nil (dr.in ())) {
            ACE_ERROR_RETURN ((LM_ERROR,
                               "(%P|%t) create_datareader failed.\n")
                              , -1);
          }

          // This is where a speed-bump should be.
          while (true)
            {
              ::DDS::InstanceHandleSeq handles;
              dr->get_matched_publications (handles);
              if (handles.length() > 0) {
                break;
              }
              ACE_Time_Value small_time (0,250000);
              ACE_OS::sleep (small_time);
            }

          // Add sleep to let the fully_associted message arrive datawriter
          // before remove_associations is called upon delete_datareader,
          // otherwise the datawriter will encounter bit lookup timeout upon
          // fully associated.
          ACE_Time_Value small_time (0,250000);
                ACE_OS::sleep (small_time);

          if (verbose) {
            ACE_DEBUG ((LM_DEBUG, "(%P|%t) *** Destroying Subscriber\n"));
          }

          // Delete data reader
          sub->delete_datareader(dr.in());

          // Delete subscriber
          participant->delete_subscriber(sub.in());
          dr = DDS::DataReader::_nil ();
          sub = DDS::Subscriber::_nil();
        }

      if (!CORBA::is_nil (participant.in ())) {
        participant->delete_contained_entities();
      }
      if (!CORBA::is_nil (dpf.in ())) {
        dpf->delete_participant(participant.in ());
      }
      TheServiceParticipant->shutdown ();

      // Indicate that the subscriber is done
      FILE* readers_completed = ACE_OS::fopen (sub_finished_filename, ACE_TEXT("w"));
      if (readers_completed == 0) {
        ACE_ERROR_RETURN ((LM_ERROR,
                           "(%P|%t) ERROR: Unable to create subscriber completed file.\n")
                          , -1);
      }
      ACE_OS::fclose(readers_completed);

    }
  catch (CORBA::Exception& e) {
    ACE_ERROR_RETURN ((LM_ERROR,
                       "(%P|%t) Exception caught in main (): %C (%C).\n"
                       ,  e._name (), e._rep_id ())
                      , -1);
  }

  return 0;
}

int do_reader(DDS::DomainParticipant_var participant, DDS::Topic_var topic, bool toggle)
{
  // Create Subscriber
  DDS::Subscriber_var subscriber =
    participant->create_subscriber(SUBSCRIBER_QOS_DEFAULT,
                                   0,
                                   OpenDDS::DCPS::DEFAULT_STATUS_MASK);

  if (!subscriber) {
    ACE_ERROR_RETURN((LM_ERROR,
                      ACE_TEXT("ERROR: %N:%l: do_reader() -")
                      ACE_TEXT(" create_subscriber failed!\n")), -1);
  }

  DDS::DataReaderQos qos;
  subscriber->get_default_datareader_qos(qos);
  qos.user_data.value.length(3);
  qos.user_data.value[0] = 0;
  qos.user_data.value[1] = 0;
  qos.user_data.value[2] = 0;
  qos.reliability.kind = DDS::RELIABLE_RELIABILITY_QOS;

  if (toggle) {
    ACE_DEBUG((LM_DEBUG, "Creating reader\n"));
    DDS::DataReader_var reader =
      subscriber->create_datareader(topic,
                                    qos,
                                    0,
                                    OpenDDS::DCPS::DEFAULT_STATUS_MASK);

    if (!reader) {
      ACE_ERROR_RETURN((LM_ERROR,
                        ACE_TEXT("ERROR: %N:%l: do_reader() -")
                        ACE_TEXT(" create_datareader failed!\n")), -1);
    }

    ACE_OS::sleep(SLEEP_SHORT);
    // Go away.
    ACE_DEBUG((LM_DEBUG, "Deleting reader\n"));
    subscriber->delete_datareader(reader);
    ACE_OS::sleep(SLEEP_SHORT);
    // Come back.
    ACE_DEBUG((LM_DEBUG, "Creating reader\n"));
    reader = subscriber->create_datareader(topic,
                                           qos,
                                           0,
                                           OpenDDS::DCPS::DEFAULT_STATUS_MASK);
    ACE_OS::sleep(SLEEP_SHORT);
    return 0;
  } else {
    struct Listener : public DDS::DataReaderListener {
      size_t found, lost;

      Listener() : found(0), lost(0) { }

      virtual void
      on_requested_deadline_missed (::DDS::DataReader_ptr,
                                    const ::DDS::RequestedDeadlineMissedStatus &) { }

      virtual void
      on_requested_incompatible_qos (::DDS::DataReader_ptr,
                                     const ::DDS::RequestedIncompatibleQosStatus &) { }

      virtual void
      on_sample_rejected (::DDS::DataReader_ptr,
                          const ::DDS::SampleRejectedStatus &) { }

      virtual void
      on_liveliness_changed (::DDS::DataReader_ptr,
                             const ::DDS::LivelinessChangedStatus &) { }

      virtual void
      on_data_available (::DDS::DataReader_ptr) { }

      virtual void
      on_subscription_matched (::DDS::DataReader_ptr,
                               const ::DDS::SubscriptionMatchedStatus & status) {
        if (status.current_count_change > 0) {
          ACE_DEBUG((LM_DEBUG, "Reader found writer\n"));
          ++found;
        }
        if (status.current_count_change < 0) {
          ACE_DEBUG((LM_DEBUG, "Reader lost writer\n"));
          ++lost;
        }
      }

      virtual void
      on_sample_lost (::DDS::DataReader_ptr,
                      const ::DDS::SampleLostStatus &) { }
    } listener;

    // Create DataReader
    DDS::DataReader_var reader =
      subscriber->create_datareader(topic,
                                    qos,
                                    &listener,
                                    OpenDDS::DCPS::DEFAULT_STATUS_MASK);

    if (!reader) {
//.........这里部分代码省略.........

//.........这里部分代码省略.........
                                    ::OpenDDS::DCPS::DEFAULT_STATUS_MASK);

        DDS::TopicDescription_ptr topic_used = topic.in();
        DDS::ContentFilteredTopic_ptr cft = 0;

        if (use_cft)
          {
            // Topic name must be unique.
            ACE_CString topic_name = "FooTopic-Filtered-" + toStr(i);
            cft =
              participant->create_contentfilteredtopic(topic_name.c_str(),
                                                       topic,
                                                       "key > 0",
                                                       DDS::StringSeq());
            if (CORBA::is_nil(cft))
              ACE_ERROR_RETURN((LM_ERROR,
                                ACE_TEXT("%N:%l: main()")
                                ACE_TEXT(" create_contentfilteredtopic failed!\n")), 8);

            topic_used = cft;
          }

        if (CORBA::is_nil(topic.in()))
          ACE_ERROR_RETURN((LM_ERROR,
                            ACE_TEXT("%N:%l: main()")
                            ACE_TEXT(" create_topic failed!\n")), 6);

        // Create DataReader

        DDS::DataReaderQos reader_qos;
        subscriber->get_default_datareader_qos(reader_qos);

        reader_qos.history.kind = DDS::KEEP_ALL_HISTORY_QOS;
        if (deadline_used)
          {
            reader_qos.deadline.period.sec     = DEADLINE_PERIOD.sec;
            reader_qos.deadline.period.nanosec = DEADLINE_PERIOD.nanosec;
          }

        DDS::DataReader_var reader =
          subscriber->create_datareader(topic_used,
                                        reader_qos,
                                        DDS::DataReaderListener::_nil(),
                                        ::OpenDDS::DCPS::DEFAULT_STATUS_MASK);

        if (CORBA::is_nil(reader.in()))
          ACE_ERROR_RETURN((LM_ERROR,
                            ACE_TEXT("%N:%l: main()")
                            ACE_TEXT(" create_datareader failed!\n")), 7);


        ACE_Time_Value sample_count_sleep(0, sample_count_sleep_msec * 1000);
        std::size_t sample_count;
        std::size_t sample_count_start = subscriberListener->samples_processed();
        do
          {
            ACE_OS::sleep(sample_count_sleep);
            sample_count =
              subscriberListener->samples_processed();
            expected_samples_received = sample_count >= expected_samples;
            // ACE_DEBUG((LM_DEBUG, "(%P|%t) sample_count = %d\n", sample_count));
          }
        while (!expected_samples_received &&
               (sample_count - sample_count_start) < samples_per_cycle);

        subscriber->delete_datareader(reader.in());

        if (use_cft)
          CORBA::release(cft);

        participant->delete_subscriber(subscriber.in());

        ACE_OS::sleep(delay_between_cycles);
      }
    while (!expected_samples_received);

    participant->delete_contained_entities();
    dpf->delete_participant(participant.in());

    TheServiceParticipant->shutdown();

    ACE_DEBUG ((LM_INFO,
                ACE_TEXT("INFO: %d samples received\n"),
                subscriberListener->received_samples()));
    if (deadline_used)
      ACE_DEBUG ((LM_INFO,
                  ACE_TEXT("INFO: deadline missed %d times\n"),
                  subscriberListener->missed_samples()));

  }
  catch (const CORBA::Exception& e)
  {
    e._tao_print_exception("caught in main()");
    return 9;
  }

  ACE_DEBUG((LM_INFO, ACE_TEXT("(%P|%t) <- SUBSCRIBER FINISHED\n")));

  return 0;
}

//.........这里部分代码省略.........
           DDS::SubscriberListener::_nil());
  if (CORBA::is_nil (sub.in ())) {
    ACE_ERROR_RETURN ((LM_ERROR,
           "(%P|%t) Failed to create_subscriber.\n")
           , -1);
  }

  // Attach the subscriber to the transport.
  TAO::DCPS::SubscriberImpl* sub_impl =
    ::TAO::DCPS::reference_to_servant
    < TAO::DCPS::SubscriberImpl, DDS::Subscriber_ptr> (sub.in ());
  if (0 == sub_impl) {
    ACE_ERROR_RETURN ((LM_ERROR,
           "(%P|%t) Failed to obtain subscriber servant.\n")
           , -1);
  }

  TAO::DCPS::AttachStatus status = sub_impl->attach_transport(tcp_impl.in());
  if (status != TAO::DCPS::ATTACH_OK)
    {
      std::string status_str;
      switch (status)
        {
        case TAO::DCPS::ATTACH_BAD_TRANSPORT:
    status_str = "ATTACH_BAD_TRANSPORT";
    break;
        case TAO::DCPS::ATTACH_ERROR:
    status_str = "ATTACH_ERROR";
    break;
        case TAO::DCPS::ATTACH_INCOMPATIBLE_QOS:
    status_str = "ATTACH_INCOMPATIBLE_QOS";
    break;
        default:
    status_str = "Unknown Status";
    break;
        }
      ACE_ERROR_RETURN ((LM_ERROR,
             "(%P|%t) Failed to attach to the transport. "
             "Status == %s.\n"
             , status_str.c_str())
             , -1);
    }

  // Create the Datareaders
  DDS::DataReaderQos dr_qos;
  sub->get_default_datareader_qos (dr_qos);
  DDS::DataReader_var dr = sub->create_datareader(topic.in (),
              dr_qos,
              DDS::DataReaderListener::_nil());
  if (CORBA::is_nil (dr.in ())) {
    ACE_ERROR_RETURN ((LM_ERROR,
           "(%P|%t) create_datareader failed.\n")
           , -1);
  }

  {
    ACE_OS::sleep (2);
    // This is where a speed-bump should be.
  }

  if (verbose) {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) *** Destroying Subscriber\n"));
  }

  // Delete data reader
  sub->delete_datareader(dr.in());

  // Delete subscriber
  participant->delete_subscriber(sub.in());
  sub = DDS::Subscriber::_nil();
      }

    if (!CORBA::is_nil (participant.in ())) {
      participant->delete_contained_entities();
    }
    if (!CORBA::is_nil (dpf.in ())) {
      dpf->delete_participant(participant.in ());
    }
    TheTransportFactory->release();
    TheServiceParticipant->shutdown ();

    // Indicate that the subscriber is done
    FILE* readers_completed = ACE_OS::fopen (sub_finished_filename, "w");
    if (readers_completed == 0) {
      ACE_ERROR_RETURN ((LM_ERROR,
       "(%P|%t) ERROR Unable to create subscriber completed file.\n")
      , -1);
    }
    ACE_OS::fclose(readers_completed);

  }
  catch (CORBA::Exception& e) {
    ACE_ERROR_RETURN ((LM_ERROR,
           "(%P|%t) Exception caught in main (): %s (%s).\n"
           ,  e._name (), e._rep_id ())
           , -1);
  }

  return 0;
}